Anableps (Gr. anablepsis, 'looking up'), a genus in Agassiz's cyprinodont family of bony fishes with open air-bladders. They are especially noteworthy for their projecting eyes, which are divided into an upper and lower portion. The outer covering or cornea is crossed by a dark band, and the inner iris is similarly divided, so that there are really two pupils instead of one. This unique structure is supposed to be associated with a habit which these fishes are said to have of swimming with the eyes partly out of the water. A. tetrophthalmus inhabits the rivers of Guiana and Surinam.